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Webcast-Catalyst9k
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802.1q Trunks and Natting

I have implemented vlans on a Cat 2948-GL3 switch. A few vlans are trunked over a 802.1Q trunk. While clients on the far end of the trunk have connectivity and full access to the network, IP natting alone does not seem to work. Clients on the far end of the 802.1Q trunk with natted IP addresses are not able to access the internet ; unless f they configure their browsers to use a proxy.

If I configure the same IP address on a client at the near end of the trunk,

( Either connecting to the 2948-GL3 directly, or through a cascaded switch) natting works. This problem is noticed for ALL the vlans which are trunked, and ONLY on the far end.

Ideas Anybody ?

1 REPLY
New Member

Re: 802.1q Trunks and Natting

That is strange, as trunking encapsulates the packet, and should not change it. Try moving the client to another area in the topology.

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